What it means
Selling on credit means handing over goods or services now and being paid later. Most customers pay, some pay late, and a small number never pay at all, and that last group produces bad debt.
The bad debt rate turns those write-offs into a percentage you can track, budget for and compare over time. The number matters because bad debt hits profit twice over.
You lose the cash you were owed and you have already borne the cost of delivering the work, so a 2% bad debt rate in a business with a 10% net margin wipes out a fifth of the profit. It is also a direct read on the quality of your credit control and your customer mix.
Finance teams calculate the rate by dividing bad debts written off in a period by credit sales in the same period. Some use the movement in the allowance for doubtful debts instead, which captures amounts expected to go bad rather than only those formally abandoned.
Both are legitimate; the important thing is to label which one you are quoting, because the expected-loss version is usually the larger number. A rising rate rarely appears out of nowhere.
It normally follows a loosening of credit checks, a push into a riskier customer segment, or a sales team paid on invoiced revenue rather than on cash collected. Reading the rate alongside an ageing report on receivables usually shows the cause within minutes.
Zero is not automatically the goal. A business with no bad debt at all may be turning away creditworthy customers and losing more in forgone margin than it saves in write-offs, so most companies set a tolerance, often somewhere between 0.5% and 2% depending on the sector.
In practice
Real-world examples.
Example
A staffing agency placing contractors with small construction firms runs a bad debt rate of 3.1%, well above its 1% target. Tracing the write-offs shows they all came from clients approved on a verbal reference, so the agency makes a credit check mandatory before any first placement.
Example
A dental practice offering payment plans measures bad debt on patient balances rather than on credit sales to businesses. At 4% it is high, but the practice concludes the treatment volume the plans generate is worth the loss and simply prices it into the fee schedule.
Example
A telecoms reseller signs a large corporate customer that later enters administration, producing a single $210,000 write-off. Because that one account represents 60% of the year's bad debt, the finance director reports the rate both with and without it so the board can see the underlying trend.
Think of it
“Bad debt rate shows what percentage of money owed to you becomes uncollectible-your loss rate.
Formula
Calculation
Bad Debt Rate = (Bad Debts Written Off / Total Credit Sales) x 100
A commercial printing company invoices $4,200,000 on credit over the financial year. During that year it writes off three unpaid accounts totalling $84,000.
Bad debt rate = ($84,000 / $4,200,000) x 100 = 2%
To put that in context, the company earns a 12% gross margin on its sales. The $84,000 written off therefore represents the entire gross profit on $700,000 of revenue, because $84,000 / 0.12 = $700,000. The business must win and deliver another $700,000 of work simply to stand still.Case study
Seen in the real world.
Vellum and Crane Print is a fictional commercial printer created to illustrate this measure. For years its bad debt rate sat around 0.6% of credit sales, which the board treated as an acceptable cost of doing business.
After a new sales incentive based on invoiced revenue was introduced, the rate climbed to 2.4% within four quarters. The write-offs clustered in one region and one customer type: small marketing agencies given 60-day terms without a credit check, because chasing paperwork slowed the sales cycle.
In this illustrative example the company changed two things. Commission was switched to pay on cash collected rather than on invoices raised, and any new account wanting more than $10,000 of credit had to clear an automated credit check. The rate fell to 0.9% the following year, and revenue barely dipped, because most of the lost sales had never turned into cash anyway.
Watch out
Common mistakes.
- Comparing bad debts against total revenue rather than credit sales, which understates the rate for a business with significant cash or card takings.
- Quoting the write-off rate and the expected-loss allowance rate interchangeably without saying which one is being used.
- Treating a rising bad debt rate as a collections problem when it usually starts as a credit approval problem.
Questions
People also ask.
What is an acceptable bad debt rate?
It depends on the sector and the terms offered, but many business-to-business companies aim to stay under 1% of credit sales and treat anything above 2% as a signal to tighten credit checks.
Does writing off a debt mean giving up on collection?
No; the accounting write-off recognises the loss in the books, but the legal right to pursue the debt survives and any later recovery is credited back when it arrives.
How is bad debt different from a doubtful debt?
A doubtful debt is one you expect might not be paid and provide for, while a bad debt is one you have concluded will not be paid and remove from receivables altogether.
From the founder's library
Take it further with the book.
Build your financial confidence beyond this definition. Shihan's full-length guide, Accounting Fundamentals, takes the same plain-English approach and turns it into a complete, practical playbook for non-finance managers, business owners and students - with chapter-end quiz answers and presentation slides included.
25% off with code MMHQ25, applied at checkout. Priced in USD - checkout may show the equivalent in your local currency.
View the book and save 25%